Butyric acid, a gut bacteria metabolite, lowers arterial blood pressure via colon-vagus nerve signaling and GPR41/43 receptors.
Onyszkiewicz M, Gawrys-Kopczynska M, Konopelski P, Aleksandrowicz M, Sawicka A, Koźniewska E, Samborowska E, Ufnal M. Pflugers Arch. 2019 Dec; 471(11-12):1441-1453. Epub 2019 Nov 15.